2y(x-y)的2次方-4y的2次方(y-x)的3次方
1个回答
2014-05-17
展开全部
2y(x-y)的2次方-4y的2次方(y-x)的3次方
=2y(x-y)²+4y²(x-y)³
=2y(x-y)²[1+2y(x-y)]
=2y(x-y)²(2xy-2y²+1)
=2y(x-y)²+4y²(x-y)³
=2y(x-y)²[1+2y(x-y)]
=2y(x-y)²(2xy-2y²+1)
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询